gnu: llvm-13: Fix build with gcc-14.

* gnu/packages/patches/llvm-13-gcc-14.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/llvm.scm (llvm-13): Use it.

Change-Id: I3b9d3b894b0ae6ffe375d3e22f4f4a07d81a77c5

gnu/local.mk

@@ -1783,6 +1783,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/llvm-9-fix-bitcast-miscompilation.patch	\
   %D%/packages/patches/llvm-9-fix-lpad-miscompilation.patch	\
   %D%/packages/patches/llvm-9-fix-scev-miscompilation.patch	\
+  %D%/packages/patches/llvm-13-gcc-14.patch			\
   %D%/packages/patches/lm-sensors-hwmon-attrs.patch		\
   %D%/packages/patches/lsh-fix-x11-forwarding.patch		\
   %D%/packages/patches/lsof-compat-linux-6.9.patch		\

gnu/packages/llvm.scm

@@ -829,7 +829,8 @@ (define-public llvm-13
       (uri (llvm-uri "llvm" version))
       (sha256
        (base32
-        "0d681xiixmx9inwvz14vi3xsznrcryk06a8rvk9cljiq5kc80szc"))))
+        "0d681xiixmx9inwvz14vi3xsznrcryk06a8rvk9cljiq5kc80szc"))
+      (patches (search-patches "llvm-13-gcc-14.patch"))))
     (arguments
      (substitute-keyword-arguments (package-arguments llvm-14)
        ((#:phases phases '%standard-phases)

gnu/packages/patches/llvm-13-gcc-14.patch

@@ -0,0 +1,12 @@
+See:  https://github.com/smlnj/smlnj/issues/279
+
+--- llvm-13.0.1.src/include/llvm/Support/Signals.h.orig	2024-12-08 14:34:21.338967469 +0100
++++ llvm-13.0.1.src/include/llvm/Support/Signals.h	2024-12-08 14:32:22.486780827 +0100
+@@ -14,6 +14,7 @@
+ #ifndef LLVM_SUPPORT_SIGNALS_H
+ #define LLVM_SUPPORT_SIGNALS_H
+ 
++#include <cstdint>
+ #include <string>
+ 
+ namespace llvm {